With the large-scale development of offshore wind power

the marine ecological imbalance caused by the wind farming operation is getting serious gradually

so it is of great significance to study the optimization of the collector system under environment restriction. In this paper

the whole-life-cycle cost of the collection system is taken as an objective

and the economic model is built to study the features of sea-cable magnetic field

which causes damage to the submarine electromagnetic environment

and a magnetic constraint value is set. In addition

the multi-party game evaluation of planning schemes is conducted from the respects of marine electromagnetic environment

economic cost and reliability

and the optimal planning scheme is obtained with economics

environment-friendly and reliability. The case analysis results indicate that the environmental constraint has an obvious influence on the optimal planning results.